JavaScript? ?? ? ??? ???? ?????, ?? ??? ??? ????? ???? ? ????. ? ?????? ?? ?? JavaScript ??? ???? ?? ????? ??? ??? ??? ? ??? ?? ??? ??? ??? ??? ??? ??? ????.

1. ??

??? ??????
???? ?? ??? ??? ??? ?? ??? ?? ???? ???? ?????.

?:

function outerFunction(outerVariable) {
    return function innerFunction(innerVariable) {
        console.log(`Outer Variable: ${outerVariable}, Inner Variable: ${innerVariable}`);
    };
}

const closureFunction = outerFunction("Hello");
closureFunction("World");

??:

Outer Variable: Hello, Inner Variable: World

??? ??:
Q: ?? ?????? ???? ??? ??? ? ????
A: ???? JavaScript?? ?? ??? ????? ??? ???? ??? ???? ? ???? ??? ? ?????.

2. ??? ???/??

???? ??????

??? ??, ??? ??? ? ??? ?? ??? ? ?? ??? ?????. ??? ??? ? ? ??? ? ????.

Async/Await? ?:

function fetchData() {
    return new Promise((resolve, reject) => {
        setTimeout(() => resolve("Data fetched"), 2000);
    });
}

async function getData() {
    try {
        const data = await fetchData();
        console.log(data);
    } catch (error) {
        console.error(error);
    }
}

getData();

??:

Data fetched

??? ??:
Q: Promise.then()? async/await? ???? ??????
A: Promise.then()? ??? ???? ? ???? ???? ??, async/await? ??? ??? ????? ??? ?? ???? ??? ?? ??? ?????.

---

3. ??? ?? ? ??? ??

??? ??? ??? ??????
??? ??? ?? ? ??? ??? ??? JavaScript ??? ??? ?????.

?:

console.log("Start");

setTimeout(() => {
    console.log("Timeout");
}, 0);

console.log("End");

??:

Start
End
Timeout

??? ??:
Q: ???? ??? ??? ???? ??????.
A: ?? ??? ?? ??? ???? ??, ??? ??? ??? ?? ?? ? ??? ?? ??? ??? ????? ???.

---

4. ?????? ??

JavaScript? ??????? ??????

?????? ???? ??? ?? ????? ??? ???? ???? ? ????.

?:

function Person(name) {
    this.name = name;
}

Person.prototype.greet = function() {
    console.log(`Hello, my name is ${this.name}`);
};

const person1 = new Person("Alice");
person1.greet();

??:

Hello, my name is Alice

??? ??:
Q: ????? ??? ??? ??? ??? ?????
A: ????? ??? ?? ???? ?? ???? ??? ???? ?? ??, ??? ??? ??? ?? ??? ?????.

---

5. ??

???? ??????

Currying? ?? ??? ?? ??? ?? ?? ??? ?? ??? ??? ?????.

?:

function outerFunction(outerVariable) {
    return function innerFunction(innerVariable) {
        console.log(`Outer Variable: ${outerVariable}, Inner Variable: ${innerVariable}`);
    };
}

const closureFunction = outerFunction("Hello");
closureFunction("World");

??:

Outer Variable: Hello, Inner Variable: World

??? ??:
Q: JavaScript?? ??? ???? ??? ??????
A: Currying? ???? ?? ??? ??? ?? ????? ???? ?????.

6. ?? ???

CommonJS? ES ?? ??

• CommonJS: Node.js?? ???? require()? ???? ??? ????? ?????.
• ES ??: JavaScript ?? ??? ???? ? ????? ???? ?????? ?????.

?:

function fetchData() {
    return new Promise((resolve, reject) => {
        setTimeout(() => resolve("Data fetched"), 2000);
    });
}

async function getData() {
    try {
        const data = await fetchData();
        console.log(data);
    } catch (error) {
        console.error(error);
    }
}

getData();

??? ??:
Q: CommonJS?? ES ??? ???? ?? ??? ????
A: ES ??? ?? ?? ???? ?? ?? ???? ???? ????? ?? ?????? ?????.

? ??? ?? JavaScript ?????: ?? ?? ? ??? ??? ?? ?????. ??? ??? PHP ??? ????? ?? ?? ??? ?????!